Assembly of a head and reflector for a lamp



June 6; 1933. A. e. STEINMAYER 7 1,912,601

ASSEMBLY OF A HEAD AND REFLECTOR FOR A LAMP Filed Feb. 5, 1951 /Z 5 I 20 v 5 /5 m /.9 zz v V Q L ll I W8 F .4 n5 /5 '57 ,2 l /5 u q 311 0044 500 dbl omwq Patented June 6, 1933 UNTEDTATES PATENT F f AI-WIN G. STEINMAYER,.OE MILWAUKEE, WISCONSIN, ASSIGNOR. TO LINE MATERIAL A COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE A ASSEMBLY on HEAD AND nnrnncron Anon A LAMP Application mea February 5,1931. Serial No. 513,532.

Thisinventionrelates to an assembly of a head and-reflector fora lamp; l

' Objects ofthis invention are toprovidej an assembly of a porcelain head and reflector 6 for a lamp in which thereflector is provided with a screw-threaded neckyand in which the porcelain head is provided with screw threads A directly formed in the porcelain headand cooperating with the threads of the reflector sothat auxiliary attaching means forholding the reflector andhead together are avoided.

Further objects are to provide a porcelain headhaving lamp receiving meansand hav- 1 ing a downwardly extending; integral, in-

ternally threaded flange adapted to receive thethreadedneck of areflector, and in which locking means are provided for locking the A .A reflector against rotation to thereby prevent inadvertent unscrewing offthe reflector from the head. a

In greater detail, furtherobjects of this invention are to provide a porcelain head AA having adownwar'dly extending, internally threaded flange adapted to receive the threaded neck ofa reflector, in which clamping means are provided for clamping the neck of the reflectorto thehead to prevent inadvert- A. entunscrewinggin which the clamping means is externally operable, and in which the entire clamping means is held in assembled position by means of an externally manipulable screw-threaded shaft. An embodiment of the invention isshown in theaccompanying drawing, in which Figure 1 is a View ofthe assembly of head and reflector withparts broken away and with parts in section. A A A Figure 2 is a fragmentary view taken on theplane indicated by the line 2-2 of Figurel.

1 Figure 3 is aperspective enlarged view of the clamping member. A A A Figure 4 a perspective enlarged view of theguiding memberL 3 a Referring to the drawing, it will be seen that the assembly comprises a porcelain head 1 which may be carried from any suitable suspension member, or other-suitable member, indicated bythe reference character 2.

This porcelain head is provided with an in tegrally formed downwardly extending flange 3 and is further provided with an in tegral outwardly and downwardly extending drip flange 4.

i The porcelainhead carries lamp receiving means such as the lamp socket 5 for instance. I

This invention contemplates the formation of internal threads 6 directly formed in the downwardly extending flange 3. The threads 6 are preferably devoid of sharp cornerpor tions, although the invention in itsbroadest aspectis not limited to thisparticular feature. For example, as shown in Figure 1, the threads 6 are provided with rounded channels and ridges. This construction has been found most satisfactory and avoids chipping or cracking of the threaded portion. Obviously another shape of thread could be used if so desired, but thisshape is preferable.

The reflector 7 may be of metal orof other material, and is provided with a metal neck 8. It is preferable in forming the reflector to construct the body portion 7 thereof of metal and to clamp this body portion to the metal neck 8 by the folded portion 9, preferably formed on the metal neck portion. This construction simplifies the manufacture of the reflector. A A

Also it is preferable to provide an inwardly directed flange 10 at the upper edge of the metal neck 8, as shown in Figure 1, to reinforce this neck andto provide a portionagainst which the clamping member herein after described maybear, although obviously'the clamping member might bear directly upoirthe threaded portion of the neck 8 without departing from the spirit of this invention.

It is to be noted from Figure 1 that the flange 3 ofthe porcelain reflectorhas a slot 11 formed therein and extending upwardly from its bottomedge and opening inwardly A of the flange. This slot receives the base portion 12 of the guiding'member. This guide ing member, asshown mostclearly'inFig ure 4, is provided with an aperture 13 in its base portion and is preferably provided with 109 a pair of spaced arms 14: which project inwardly of the flange 3, as shown in Figure 1. The clamping member 15 may consist of a small plate which is provided with notches 16 which slidably receivethe arms 14 of the clamping member. It is also provided with a threaded aperture 17 and with an inwardly turned lip 18 adapted to be located just below the flange 10 formed on the neck 8 of the reflector, see Figure 1. r Y

A shaft 19 projects through the flange 8 and is provided with a screw-threaded, pref 11. The threaded portion 20 is screwed into thefthreaded aperture 17 of the clamping member.

In using the apparatus, the clamping member 15 is moved inwardly with respect to the flange 3 by rotating the manually manipulable external member 21. Thereafter the reflector is screwed into position, as shown in Figure 1, preferably with the upper portion of the folded portion 9, which forms a shoulder 22, directly engaging the bottom edge of the flange 3 of the porcelain reflector. Thereafter the clamping member 15 is moved into binding engagement with the flange 10 by rotating the member 21, see Figure 1. This clamping member 15 thus locks the reflector against rotation and thereby prevents inadvertent unscrewing ofthe reflector from the porcelain head.

When it is considered that inthe manufacture of porcelain articles that slight variations occur, it will be immediately appreciated that it is preferable to provide a fairly free fit between the threaded portion 6 of the flange of the porcelain head and .the

threaded portion or neck 8 of the reflector.

However, this invention does not allow loosening or unscrewing to occur, although there may be a fairly free fit between the metal neck of the reflector and the porcelain head. The invention provides clamping means which locks the reflector against rotation and thus prevents unscrewing, even when the assembly is'swayed or jarred by gusty winds or through other means. Instead this invention insures the correct positioning of the reflector at all times. j v

This invention also provides a porcelain reflector in which the threads are directly formed therein. thereby avoiding the heretofore complicated constructions.

Although this invention has been described inconsiderable detail, it is to be understood that such description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed.

I claim:

1. An assembly of a porcelain head and a reflector for a lamp comprising a porcelain --head having a closed upper end provided with suspension means and having an outwardly projecting drip flange and having a downwardly projecting flange, said downwardly pro ectmg flange havmg internal screw threads directly formed therein, lamp receiving means carried by said porcelain head, a reflector having a metallic neck portion provided with external threads fitting the internal threads of the downwardly extending flange of said porcelain reflector, and means for locking the reflector against rotation, said means having an external manipulating portion located below said drip flange.

2. An assembly of a head and reflector for a lamp comprising a head having a down- .7

wardly projecting flange having internal threads, said head having means for receiving the lamp, a reflector having a neck provided with external threads cooperating with said first mentioned threads, a screw member extending through said flange and provided with an external thumb piece and provided with an internal screw-threaded portion, and a clamping member operated by said screw and engaging the neck of said reflector whereby said clamping member may be drawn into binding engagement with the neck of said reflector to thereby prevent r0- tation of said neck with respect to said flange.

3. An assembly of a head and reflector for a lamp comprising a head rovided with means for receiving a lamp an provided with a downwardly extending internally threaded flange, a reflector provided with an externally threaded neck cooperating with the internal threads of said flange, a guiding member carried by said flange and projecting inwardly thereof, a clamping member carried by said guiding member and adapted to engage the neck of said reflector, and an externally operable screw for moving said clamping member into and out of engagement with said neck.

4. An assembly of a porcelain head and reflector for a lamp, said assembly comprising a porcelain head having a downwardlyprojecting internally threaded flange, a reflector having a threaded neck adapted to be screwed into said flange, saidflange having a slot extending upwardly thereof and opening inwardly of said flange, a guide seated within said slot and projecting inwardly of said flange, a clamping member adapted toengage said neck and slidably carried by said guide, ascrew member threaded into said clamping member and projecting through said flange.

5. An assembly of a porcelain head and reflector for a lamp comprising a porcelain head having a downwardly extending in ternally threaded flange, said flange having a slot extending upwardly from its lower edge and opening inwardly of said flange, a

guiding member having a base portion seated within said slot and having a guiding portion projecting inwardly of said flange, a

shaft holding said guiding member 1n assembled position within said slot and projecting through said flange and having a.

threaded portion located inwardly of said flange, a clamping member slidably carried by the guiding portion of said guiding member and screwed upon the threaded portion of said shaft, and a reflector having a threaded neck cooperating with the threads of said flange and adapted to be clamped by said clamping member when said shaft is rotated.

In testimony whereof, the signature of the inventor is aflixed hereto.

ALWIN G. STEINMAYER. 

